How Hantavirus Spreads: Contagious, Airborne, Human-to-Human

Most hantavirus infections start with exposure to infected rodents. Risk rises when dried urine, droppings, saliva, or nesting material become disturbed and particles are inhaled.

Bites and scratches can transmit hantavirus but are considered rare compared with inhalation and contact with contaminated materials.

Andes virus is the only hantavirus with known person-to-person transmission. CDC describes risk through close contact with a sick person, including direct physical contact, prolonged enclosed exposure, or exposure to body fluids.

This does not mean casual public spread is expected. It explains why identified MV Hondius contacts are monitored while the wider public-health risk remains low.

In hantavirus guidance, airborne risk usually means breathing contaminated dust from rodent waste. It should not be read as routine long-range airborne spread between strangers.

For MV Hondius, the key concern is Andes virus close-contact transmission among passengers, crew, caregivers, or household contacts during the monitoring window.